Mechanism for interleaving sheets.



H. P. BROWN i C. L. OHNSTON.

MECHANISM FOR INTERLEAVING SHEETS,

APPLlcATmN F|LE11.DEC.15, 1913.

LQWAU, PmmedJune 5, 1917 4 SHEETS-SHEET l.

HP1 BRQWN 6.1 C. I.a J0H'\{S'Oi`\2 MECHANiSIYl FUR INTEHLEAVING SHEETS.

APPLICATION man GEC. '15, |913.

BQKU@ u Patented June 5,1917.

4 SHEETS-SHEET 2.

H. P. BROWN 6L C. L. JOHNSTON. MECHNISM FOR INTERLEAVING SHEETS.y

APPLICATION FILED DEC. l5' 1913.

l ,228,400, APaelled J une 5, 1917.

4 SHEETS-SHEET 4.

"i anni t entre* *l time 9 ou mi patented lune 5, MM?.

Application tiled December 15,. 1913. Serial No. 808,732.

To all' tui/tom t may concern:

le it lrnown that we, lloaaon l?! laown' and Eminence L. tloirxs'rox, both citizens ot' the llnil'ed States, both residing;` at Oakland in the county et' Alameda and State of `Cali'lmn'ia. have invented new and use- :t'ul improvements in Mechanism for interleavingg` Sheets. ol? which the following is a specification.

'lhis invention relates to a machine tor cutting` iolding interlocking and stacking paper. and involves means especially1 lier interloelzing paper ted troni a. plurality of continuons rollers.

it is the object et the present .invention to provide a practical machine ot maxinuun. capacity capable ot drawing" material 'trom a pluralit)7 ot rolls of stock and enttiujrM it'olding, interloekine,k and packaging the eut sheets; and it is a partienlar object ot the present invention to provide a inaehiue for nianlrlacturing paper towels.y toilet pape' and the. like, economieallpT and rapidljr and airing; eaeh sheet a rein loroing ina rginal fold.

The inrention consists of the 'parts aud the Combination and construction oit parts as lnfreinalter more full)v described and claimed. havingT reference to the accompany- .'ingf; drawings. in whichlfinure l is a perspective riewot one oli the 'Folded sheets or leaves. partir open.

Fig. Q shows diajrrnininaliealljv a stark ot the sheets as produced bj' the machine.

Fig'. f3 is a plan View ot the mechanismwith parts in. section.

'Fig'. -lA is a vertical longitudinal section. Fig. shows diagraunnatically the method ol alterna-te iuterlaeinp; of the sheets.

ln Fig'. l there is shown a towel or sheet such as is produced b v the present novel niaehlne. each .sheet comprising' when told ed a top leat o and a lower leaf ulconneet ed alongthe fold UP; the outer edge oli the bottoni lea lE o7 being' "Folded outward at o3 to torni a transvm'selv extending' narrow flap marginal reiniort-ingrpart rf; the three 't'olds m nl and n," beine' arrai'lgred in zigzag". Aa shown in Fig. f the leaves are, stacked by 'the present machine in such fashion that between the leaves u, and o1 of one sheet and adjacent to the 'told o2 thereot` there is in-i -teiitohled a leaf o1 ot the next sheetIy whose told 71 is at lhe opposite aide ot the staelfk troni the told n? ot' the lirst sheet: in other words3 the inaehine will produce a staeli nit sheets designated for the. purpose of identification as A and B, with all of the folds .2 at the lett' ot the stack, while all of the folds b2 will be at the right of the stack, as viewed in Fig. 2, the sheets in the stacks ilil'l beingvotherwise toldedidentically.

.A stach ot sheets thus interfolded is genorally.Y dispensed from a suitable holder not here shown. whereby the bottonnnost leaf al of a sheet with its marginal edge a* is exposed. As the sheets are used from the bottonn the sheet 'removed from the stack draws out therefrom the next interlocked leall ,for portion of the succeeding sheet. The present machine .is designed t fold and ntorleat' these sheets where they are to be used as paper towels` and the sheets are necessarily ol considerable size.

lt is to produce these towels, cut, folded and stacked in the manner above described, that we have devised the present machine. is a suitable traine structure in which is appropriately mounted a pair of 0pposed cylinders iFP-1G having resp ctive shafts l-l---MZ The paper webs from which the respective sheets -B are t0 be cnt, are indicated at C-D and come froinany suitable source and ted and tensioned by an.)T a pproj'niate means. Shaft 14 is driven troni a nj' suitable source of power. lt 'car.

ries a gear 123 meshing a gear 1S of similar proportions. so that the two cylinders l5 and lo operate at uniform speed in opposite directions; their peripheriesbeing in such juxtaposition between the, shafts 14 and 1T as to permit the paper drawn from the stoel; to pass therebetween.

Mounted longitudinalljT in and projecting liievond the circumference of each of the cvlinders 1.3 and 1.6 are ixed adjustable folder blades 2l. ot which there are two in each cylinder. and being; diarnetrically set intheir respective cylinders and the cylinders so set that their blades are at a position 90o to the blades of the opposite eylinder. so that during' a complete revolution of the two geared cylinders first one and then the other of the folder blades 2l will be alternatel)r projeeted across the diainetral plane between the axes et the shafts lei-17. For the clearance and entrance ot the blades 21 into the cooperating portions of the opposile erlinderslhese ylatter are provided with dianielricallv opposite longitudinal slots which are timed to register aeeu.

of 'be present which l@ as bei (esci-ibm? Yu shown i, Fig; as mw dmvz'l upon the Suf."

2 mule-@ number of lill meat-,oo

the cylinders draw the palper around. its the projected pin retaining devices or pins lo are retracted, as 1s shown in the cylinder lll, so as to release the paper held on its cyl-` inder and coincidentally with the retraction of the retainer pins 4G which draw the end of the paper down toward the diametrall plane of the shafts 14C-17, and as the grippers are drawn into clamping engagement with the inwardly folded stock, as in Fig. el, another set of pins lil, which are mounted in appropriate arms -lQ secured on the gripper rocker shafts 25, are projected through the cylinders l5 to pick up the end of the paper 'which the retracted pins #i6 release so that the loose or leading end of the 'paper from the'cylinder i6 will be drawn around the lower quarter surface of the cylinder l5.

lis the fold of paper or towel is released by the grippers tbe following' end. of the towel on the upper quarter surface of the cylinder l5 and lying between the folder blade 2l of the cylinder '1G and the cutter l() of the cylinder l5 will be carried to the right, as at arrow c, and the loose or railing' end behind thc grippers will fold over the leading end from the cylinder 16, which has been picked up by the draw pins 1l@ and will be released by these pins when the 2grij'ipers 5 more downwardly the predetern'lined distance and are released by the action of the cam Q8 upon the zgripper lever Q6, operating to lift the grippers 23 from the fold of the stock.

Any suitable mechanism may be utilized to project and retract the 'pins 46 for picking up the leading enc s of the stock from the rolls, and in the present instance this mechanism comprises roller shafts 50, of which there are two mounted in each cylinder, these shafts being provided with rocker armsl in the outer ends of which the pins et@ are suitably mounted, the pins projecting `through apertures 52 formed for their reception in the contiguous portions of the insert members 4:3. Y

The rocker shafts are each provided at one end with a lever 53, carrying a cam roller 54 which is adapted to engage during its cycle with its cylinder, a xed suitable cam 55 set to throw the lever to roclt the shaft 50 and retract the draw pins 46 at thc proper' time 'in the operationl Thus it will be seen that the length of each towel section as it is severed from the iii-feeding web of stock is about equal to one-half of the circumference of the cylinder or drum l5 or lG, over which it is drawn into the machine; and it will be further seen that while a portionof the stoel: in being severed at the top of the cylinders or drums 15e-16 by the cooperation therewith of the cutter blades Jl() of the slots lll, coincidentally therewith the approximate central portion of the strip at the moment of of the other cylinder, so that, in other words, 7

being,` cut'at the top is being folded by the coperation of the projecting folder blade 2l of one cylinder entering the slot formed for its reception in the contiguous portion each towel "is folded transversely and ap proximately one-half of its length.

By providing the folding devices in quarter positions upon the opposite drums ifi- 16, lirst one section of the towel will be folded at the bight of one of the grippers Q3 of one cylinder, and this bight drawn, as in Fig'. l, downward to the right and re leased while the next succeeding towel is transversely folded to form ay big'ht by the oppositev cylinder or drum by its respective acting gripper, to carry the bight or fold of the towel to the left; this alternate disposition and foldingof the towel sections progressing constantly as a staclr of towels is produced.

Bj' disposing the projecting' edge of the folder blades 21 in advance of the knife re ceiring slots ll. when the knife severs the paper behind the folding blades, and the folding' blades more down into cooperative relation with the adjacent slot 22 of the other cylinder, the short lap o* of the towel will be formed by the short remainder of the towel section existing between the edge of the i when the folder blade 21 enters the adjacent slot 252 and the stock is pinched by the grippers i225; it being remembered that the folder blade 2l. at the same time that it folds the Mw trailing end of the stock which has been cut at the slot il also folds the next followingr Itowel from the opposite cylinder midwa;7 its length and thus as the double folded stock is carried `by the grippers downwardly in the direction of the arrows o or d, respectively,

so accordingly will the bight or fold a? or of inclose the narrow lap of' or o4.

lt is manifest that the details of construction may be vvaried without departing' from j 10 the principle of the intention.

flaring thus described our invention what we claim and desire to secure by Letters Patent isl. lll'ecbanism for interfolding sheets, 315 which consists in the combination of a pairc of cylinders arranged -parallel to each other, gripper means carried by said cylinders for alternately folding' web sections so that each' section is folded once upon itself, with one leaf of one section interleaved with'the two leaves of another section, means coperative' with the cylinders for cutting the webs, and feed means for engaging the leading ends of the severed webs.

Q. Mechanism for interfolding sheets, which consists in the combination of means for simultaneously feeding: a plurality of Webs, with means for enttinajthe webs into sections of* uniform lengths "including re- LTD commi seetwns so folded and substanizal onhzzli? of am 0133305651 sec- 'fuon, the Qyhmes my? :um ble-fles and jaws opel-ated .im muse muh" mgagg. a termi.. :l one Section :md 'dfc an opposd icm in a f l; 1r jam :m means in camz@ the ten'xna ci? @aah secA "ao @m from @time gpper jawa in a. machine if: f md misre papa1: uws md 2., ih?,

auch mi' indem with Hach' to shift the Shams from cynde' to cylinder whereby the papers delivered; alternately by die cyncers' in nterleaved sucks.

in a pape? cutting and. folding; ma Chimay the cmbnaton of copemw @yiinde's for fqe'lg and nuereaviug shees nf impar, gripper jaws on nach of said CyL indu-s, folder hades on each, of smid cyinders n'lopemtng with i'hefaws nu the opposite cylinder? rsmsfmpins; on each of said, uynders adjacent to hejaw movabe, in and nui in shhi; the shfjes from cylinder to cy'nder whereby the papers uw delivemd aenately by lha Qyndes in interleaved. sacls? separate @am mechanism im' said gripper jaws ami trans/fe? pins, a @Waring Hice copmating with auch of Savi cyindem to cui ifm: papel in 'proper engths :1s thwamne is fed n i; continuous web tu the sjlindersg pickup @ins fnovabe in n out; (m re-:deh ai' sais cylinders t@ emgagfe'wh the leading' 2nd of th@ nwming web@ papal', md @afm n'iechanism fr actlzting sa pickup pn's.

the other web, folding means on eaeli Cylinder for eaeli web section entering over it means on eaeli cylinder to guide the entering sections to the folding means on. the other cylinder, and means to transfer the loose ends of the sections to the opposite c ylinde' and maintain the loosfefeiifis in interleaved position with the complementary folded section.

42. Cooperative foldin(T and interleaving Cylinders, a tiicling inem. er on each cylinder cooperating with a slot in the adiaeent` cylinder to fold the sheets in alternate in-| teileaved fashion, and transfer pins adja- Cent to each slot and movable iii and out on the cylinder to engage the sheets on both cylinders and carry them around to discharging position beneath the Cylinders.

l-l In combination, means for severing sheets of paper, and bringing said sheets into juxtaposed relation with substantially half of one sheet overlapping an equal amount of anotherslieet, means for siilose qiiently folding the overlapped sheets along the median and marginal line to simultaneously produce a i'narginal fold on one sheet Within the median fold of the overlapped sheet, said folding .means interleaving said overlapping sheets so that each sheet When folded ineloses Within its fold approxi mately one-half of another sheet.

44. Mechanism for interfolding sheets which consists in the combination of means which inelnde a pair of closely arranged eo- 4 operating Cylinders between which two Webs of paper are liroiiglittogetlier, means for eiittingftliel webs into sections of desired lengthwwitli the ont sections overlapping so that `one section overliessiibstantiall, half of aii opposed section, means carried )y the cylinders for interleaving the ont s ons so that one leaf of one section will lie infolde'dy with the two leaves of :in-opposing section, and ineans for forming a reinforeingv fold alongr a terminal edge of each section.

eyzioo agi in overlapped position for interleaving means on. the cylinders for interleaving the sections so that substantially one-half of one section is interleaved with the opposed folded section, and means by which a iiiarginal reinforcing fold is formed along the edge of tlieinfolded leaf.

elo. ln a paper folding mechanism, a pair of coordinate drains with sets of tasking jaws to receive the folds of sheets of paper, the set of each drinn being arranged ont of incidence with the set of the other drinne, sets of eri-acting folding means on each drum arranged intermediate said jaws,` said folding means acting alternately and laying' the sheets in interfolding zigzag relation, and

transfer means on said drums for withdrawing the loose ends of the sheets from their carrying drinn.

l?. Iii a paper folding mechanism, a pair of coordinate vdrains with setsof tueking jaws to'reoeive the folds ofheets of paper, theset of each, drum being arranged. out of incidence With the set of the other drain, sets of vco-aoting folding means on each drum arranged intermediate said jaws, said folding means 'acting alternately and laying between which paper sections are delivered the sheets in interfolded zigzag relatioinyand transfer means on said drums for withdraw? -ing the loose ends of the sheets from their 

